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6 Volt to 12 Volt Conversion
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Posted by MW on October 12, 2004 at 20:31:18 from (24.136.233.111):
I have just completed a 6 to 12-volt conversion on a 140 Farmall following Bob Melville's instructions from the article titled "Step by Step 12-Volt Conversion". My problem is: when I turn the ignition switch on, the ammeter deflects to the right and when the engine is running it deflects to the right as well too. I initially switched the ammeter wires since the system was previously a "positive ground" one. But, on the pre-start test, I noticed when the switch was turned on, the ammeter deflected to the left as indicated correct by the instructions. However, when the engine was running the ammeter also deflected to the left, so I switched the ammeter wires to their original position. The tractor seems to run fine and according to the alternator-light, it is charging the battery when running. Why does the ammeter deflect to the right when the switch is on and the engine is NOT running? Thanks
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